cb241339b9
ext[234] have always allowed unimplemented chattr flags to be set, but other filesystems have tended to be stricter. Follow the stricter approach for tmpfs: I don't want to have to explain why csu attributes don't actually work, and we won't need to update the chattr(1) manpage; and it's never wrong to start off strict, relaxing later if persuaded. Allow only a (append only) i (immutable) A (no atime) and d (no dump). Although lsattr showed 'A' inherited, the NOATIME behavior was not being inherited: because nothing sync'ed FS_NOATIME_FL to S_NOATIME. Add shmem_set_inode_flags() to sync the flags, using inode_set_flags() to avoid that instant of lost immutablility during fileattr_set(). But that change switched generic/079 from passing to failing: because FS_IMMUTABLE_FL and FS_APPEND_FL had been unconventionally included in the INHERITED fsflags: remove them and generic/079 is back to passing. Link: https://lkml.kernel.org/r/2961dcb0-ddf3-b9f0-3268-12a4ff996856@google.com Fixes: e408e695f5f1 ("mm/shmem: support FS_IOC_[SG]ETFLAGS in tmpfs") Signed-off-by: Hugh Dickins <hughd@google.com> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Radoslaw Burny <rburny@google.com> Cc: "Darrick J. Wong" <djwong@kernel.org> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.